Ventilator



Patented Feb. 16, 1932 UNITED STATES PATENT ori-ice VENTILATORapplication ma october 14, 1929. semi no. saaeeo.

The invention relates to Ventilating devices for use when removal of airor gases and their replacement with fresh medium is required. Itis aspecial aim of the invention to present a device for such purposes whichis adapted to both remove and introduce air or gases simultaneously.This is of special advantage in certain situations Where heretofore ithas been a practice to use a blower either to introduce fresh air, or toremove fouled air. In the first instance when fresh airis forced into achamber such as a kitchen, the displaced air and vapors with attendantodors are apt to be forced into dining or other rooms where patrons willbe annoyed; in the second instance, mere removal of undesired air andgases and permitting them to be replaced haphazardly through doors andwindows results in admitting undesirable air or vapors in manyinstances. By the use of my invention a single compact unit is adaptedto serve for removal of undesired gases and introduction of air or gasesfrom a preferred source. In Ventilating spaces beneath roofs, it isoften essential to both expel undesired air and introduce fresh air, forwhich my invention is especially suitable.

It is an important aim of the invention to present a combined airventand air supply device which may be incorporated with a simple singleflue mounting, involving a minimum of complication both in structuralwork and extent of labor involved.

A further purpose is to present a novel construction in mounting andflue constructions in such devices. It is also an object to originate anovel and useful control and operating means for such an appliance.

Additional objects, advantages and features of invention reside in theconstruction, arran ement and combination of parts involveg in theembodiment of the invention, as `will be understood from the followingde- Scri tion and accompanying drawings; in the atter,

Figure 1 being a vertical sectional view of a portion of roof and aventilator installed, embodying my invention,

Figure 2 is a horizontal ysectional view on the line 2-2 of Figure 1;

A suitable opening is cut through the deck between the headers 1 3, anda top thimble 14 65 with a flashing flange 15 is secured upon the upperside of the deck around this opening,

the thimble including a vertical cylindrical collar portion 16terminating in a substantially horizontal flange 17. A bottom thimble (018 is secured on the headers 13 and adjacent rafter portions, the bottomthimble having a Vertical dependent collar 19 without a flange, andalined with the collar 16.

Revoluble in the two thimbles there is a cylindrical flue 20, providedwith a collar 21 at the upper art adapted to lie over the flange 17, theco lar having a depending annular flange 22 extending downwardly besidethe flange 17 so as to close the space beso tween the two. The flange 17and the collar 21 where they abut are preferably of uniform undulatingform, or corrugated, so that the corrugations of the collar nest withthose of the flange 17 and must move across them 86 when the flue isrotated. In this Way the weight of the flue tending to hold thecorrugated faces in nested relation will prevent casual displacement ofthe flue from positions to which it may be adjusted b rotation, as willbe explained. The flue is ormed with a T terminal or head 23 at theupper end, the ends of which are onen and flared suitably.

`The flue is divided vertically by a septum or partition 23 which mayabut or be joined 95 to a horizontal septum 24 diametricall arrangedinthe T head 22. Affluent and e uent passages 25 and 26 are thus formed.The device may be utilized in this simple form `by leaving the bottom ofthe flue plain and open on both sides of the septum, and when one end ofthe T head is presented toward the direction in which a b-reeze blows,the air may pass freely through the passa-ge in the T head at the upperside of the septum 24, while that entering at the lower side of theseptum 24 will be forced downwardly through the flue 20. The flared.entrance to the T head will cause a slight compression of air in thepassage. This, together with the friction ot air moving from the upperside on that immediately below, and by the vacuous condition around theeXit end of the T head caused by the air diversion due to the iiaredsides, will produce an ejector action lby which air will be drawnupwardly through the lflue to the exit end of the T head and discharged.

Means is illustrated, however, whereby a 'forced draft maybe producedfrom within through the eiiluent passages of the flue and T head, withan arrangement whereby the equivalent of the sim'ple flue firstdescribed may be produced at any .time when desired. Thisconsists in.the formationof a closed case or .chamber 27 on fthe lower end of theflue within which is mounted a fan 28 adapted to blow air upwardly, thecase being open .downwardly and the lower end of the septum 23 beingcontinued laterally .to close .olf the affluent passage from the chamber27, anda .case .havin-g .an outwardly extended handle positionedconveniently for .operation .of the lever. A series of slots 32 areformed in the side .of .the iue communicating only with the efllu'entpassage, and on the flue .a shutter 33 is suitably mounted to `close theslots .by a

short movement of the shutter. The shut-ter is .connected by a link 34with the bell crank lever y31, so that the kslots 32 are `closed at thesame time V-that the valve is opened.

y ,lVhile .the invention has been incorporated in a roof as shown, ifdesired it may be used in its unit `form to Vbe inserted in variousYopenings in buildings or the like, and the non-essential parts in suchadditional uses may Ibe yomitted as discretion indicates.

kThus, for use in .openings in walls, .the cross head or T portion ofthe -flue may -be omitted in some cases, and the motor draft utilizedwithout expectation of using the natural draft.

A control for the fan or blower is provided, consisting of -a switch-35including the throw lever 36 movable upwardly to .open the switch. Theswitch may be connected with Vthe motor of the ytan and .with `anl,electrical source by usual circuits, not shown. As shown, upwardmovement of the lever 31 will close the shutter 33 and open the valve 30by reason of connection of these elements with links extending upwardlyfrom the outer part of the lever. The lever is eX- tended inwardlybeyond its pivot ,and this extension 37 .connected by' a short link 38to the lever 36. As a result, when the lever is raisedV to close theshutter and open the valve, the .switch to the motor of the fan is alsoclosed and the fan caused to operate.

In both operative positions the handle klever 31 is not far fromhorizontal position,

so that it may also 'beused readily to rotate the ue and head n23 Iby,horizontal movement .of the-handle, Aand ,full advantage may ghe takenof wind currents in various directions. In this use, such .adjustmentsof the shutter Valve and switch as may have been made will not nbedisturbed.

I claim y l Y 1. A Ventilating appliance comprising :a horizontal headhaving open inlet and Aoutlet flared ends `and partitioned to form :anopen passage therethrough, affluent andl eliicient .ducts communicatingwith the inlet and outlet .ends respectively beside said passage, ablower connected with `the inner end of the eiiluent duct, a valve inthe eliluent duct,"

means to operate the valves, a latenal opening :from the .effluent ductoutwardly `Qi :the valve, a shutter therefor and means to yclose theshutter whenthe valve is open.

2. A ventilator appliance comprising a vertical cylindrical flue havinga comment cat-ing cross head, aiiluen-t Land etliuent passages formed inthe nue, said passages in ,the Vflue opening at respective ends of thehead, a Support for the {flue Vincluding an annular base memberencircling the flue andan opposed relatively revjoluble annular member-on the flue rest-ing on the ibase, fsaid annular members having opposed.contacting :uniformly eundulated faces, whereby fthe weight 0f the lueopposillgthe rising the .upper annular member will tend lto hold thedevice iin adjusted positions .and means -to rotate the 3. The structureof claim l including a control for the blower, and operativeLconnecy:tions common tothe control, the valve `and the shutter,constructed to placesaid control in .blower-operating position, open thevalve and .close the shutter at one limit 0f move- Vment of theoperative connections, and place the said control in non-operatingposition close the valve and 4open :the shutter at ,another limit ofmovement. Y Y

4. The structure of claim l in head and ducts lare mounted as .-a unit`Iievoluble on a vertical axis, a control for the blower mounted on Vtherevoluble i1-nit, and operative connections also mounted .on therevoluble unit between the said cont-rol, the

whichy said Ill@ valve and the shutter, constructed to place the saidcontrol in blower-operating position open the valve and close theshutter at one limit of movement of the operative connections, and atanother limit of movement to place the said control in non-operatingposition close the valve and open the shutter, said operating meansincluding means to rotate said unit on said axis.

In testimony whereof I aiiix m si DAVID ature. IRD.

